Steca Elektronik GmbH S2403-A PCB Circuit Board is a model-designated printed circuit board produced by Steca Elektronik GmbH. In some catalogs and online listings, this part is shown under the alternate name Steca Kiener S2403-A PCB Circuit Board, reflecting cross-listing across distributors. The S2403-A designation uniquely identifies this specific PCB within Steca's line of circuit-board components. The product title you provided—Steca Elektronik GmbH S2403-A PCB Circuit Board—serves as the formal identification for this part.
